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Blazing-Fast Unlimited FLUX.2 Klein Text to Image & Image Editing Generator (4B/9B)

This is Black Forest Labs' fastest line of AI image models, offered in both 4B and 9B variants. It produces gorgeous high-quality images in under a second, with built-in unified text-to-image and image editing tools, and runs on consumer-grade GPUs with as little as 13GB of VRAM.

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FLUX.2 Klein Text to Image Showcase

Get lightning-fast sub-second image generation from both the 4B and 9B variants of FLUX.2 Klein

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Teotihuacán Pyramids (4B)
AI Image
New York Skate Culture (4B)
AI Image
Man with Black Panther (4B)
AI Image
Skeleton Surfing (4B)
AI Image
Creative Art (4B)
AI Image
Snake & Samurai Sword (9B)
AI Image
Gen Z Students (9B)
AI Image
Fashion in Blizzard (9B)
AI Image
Pregnancy Announcement (9B)
AI Image
Whimsical Flower Shop (9B)
AI Image

Teotihuacán Pyramids (4B)

Stunning ancient pyramids paired with a futuristic Saturn hanging in the sky, boasting rich cinematic depth and atmospheric perspective

Prompt

ancient monumental Teotihuacán pyramids illuminated by red lights, in the sky a giant Saturn suspended in the sky, sculptural and non-astronomical, with rings of liquid metal, futuristic yet archaic, evoking a sacred portal rather than a planet

FLUX.2 Klein Image Edit Showcase

Revamp any image in less than a second with the powerful smart AI editing capabilities of FLUX.2 Klein

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Input
Comic Style (4B) - Input 1
Image
Gender Change (4B) - Input 1
Image
Oil Painting Style (4B) - Input 1
Image
Eiffel Tower Background (4B) - Input 1
Image
Gender & Outfit Change (4B) - Input 1
Image
Person Compositing (9B) - Input 1
Image
Input 1
Person Compositing (9B) - Input 2
Image
Input 2
Football Field (9B) - Input 1
Image
Oil Painting Style (9B) - Input 1
Image
Strawberry Transform (9B) - Input 1
Image
Dog Transform (9B) - Input 1
Image
Output
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AI Generated
AI Generated
AI Generated
AI Generated
AI Generated
AI Generated
AI Generated
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AI Generated
AI Generated
AI Generated
AI Generated
AI Generated
AI Generated
AI Generated
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AI Generated
AI Generated
Comic Style (4B)

FLUX.2 Klein YouTube Videos

Watch demonstrations and tutorials showcasing Black Forest Labs FLUX.2 Klein's ultra-fast AI image generation and editing capabilities

FLUX.2 Klein Popular Reviews on X

See what people are saying about FLUX.2 Klein on X (Twitter)

FLUX.2 Klein is here, and it come in 2 flavors: 9B parameters 4B parameters Both with a base model (!) and a 4-step distilled one 9B has the traditional FLUX.2 non-commercial license 4B is Apache 2.0 🙌 Try it out 👇

Black Forest Labs
Black Forest Labs
@bfl_ml

Introducing FLUX.2 [klein]. Blazing fast. Beautiful. Generate stunning images in under a second while maintaining exceptional quality. Great for fast editing, changing styles, and developing ideas from 0 → 1. Available via API, or run it locally - Klein 4B under Apache 2.0,

Reply

FLUX.2 [klein] is out & optimized to run best on RTX GPUs. Try it out & share your creations! 👇

Black Forest Labs
Black Forest Labs
@bfl_ml

We're also releasing FP8 and NVFP4 quantized variants, built in collaboration with @NVIDIA_AI_PC for optimized inference on RTX GPUs. • FP8: Up to 1.6x faster, 40% less VRAM • NVFP4: Up to 2.7x faster, 55% less VRAM Run FLUX.2 [klein] on even more hardware.

Reply

FLUX.2[klein] new image model from BFL

Black Forest Labs
Black Forest Labs
@bfl_ml

Introducing FLUX.2 [klein]. Blazing fast. Beautiful. Generate stunning images in under a second while maintaining exceptional quality. Great for fast editing, changing styles, and developing ideas from 0 → 1. Available via API, or run it locally - Klein 4B under Apache 2.0,

Reply

🚨FLUX.2 [klein] by @bfl_ml is now available in the Image Edit and Text-to-Image Arenas. Built for speed we have: 🔹flux.2-klein-9B 🔹flux.2-klein-4B (Apache 2.0) Test them head-to-head against other frontier AI models, and then vote to see where it ranks on the leaderboard.

Image
Black Forest Labs
Black Forest Labs
@bfl_ml

Introducing FLUX.2 [klein]. Blazing fast. Beautiful. Generate stunning images in under a second while maintaining exceptional quality. Great for fast editing, changing styles, and developing ideas from 0 → 1. Available via API, or run it locally - Klein 4B under Apache 2.0,

Reply

What's FLUX.2 Klein

Black Forest Labs' fastest compact model family for sub-second image generation and editing

4B/9BParameters
<1sGeneration
13GBMin VRAM
4-7Credits

FLUX.2 Klein is a revolutionary compact model family that unifies text-to-image generation and image editing in a single architecture, delivering state-of-the-art quality in under a second.

Frequently Asked Questions for FLUX.2 Klein

Still have questions?

As Black Forest Labs's fastest family of AI image models, FLUX.2 Klein is built for sub-second generation and editing on consumer GPUs. It uses a compact architecture with 4B and 9B parameter variants that run on hardware like RTX 3090 or RTX 4070 with as little as 13GB VRAM, unlike larger models such as FLUX.2 Pro or FLUX.2 Dev. Uniquely, it unifies text-to-image generation and image editing in one single model, removing the need to switch back and forth between separate tools.
The 4B model is optimized for top speed, generating images in as little as 0.3 seconds on high-end hardware, requiring only ~13GB VRAM, and is released under an Apache 2.0 license for commercial use. The 9B model delivers higher quality results that match output from models 5x its size, targets ~29GB VRAM (RTX 4090 and above), and takes roughly 0.5-2 seconds per image. Both variants use the same 4-step distilled inference and share the unified generation/editing architecture.
FLUX.2 Klein packs three core capabilities into a single model: text-to-image generation from prompts, single-reference image editing that lets you modify an existing image with custom instructions, and multi-reference generation where multiple input images and a prompt work together to define the final output. This makes it ideal for rapid prototyping, style transfer, character consistency, and interactive creative applications.
FLUX.2 Klein 4B text-to-image costs 4 credits per generated image, while the 9B variant costs 5 credits per image. For image editing, 4B costs 5 credits per edit and 9B costs 7 credits per edit. This pricing puts Klein among the most affordable options for high-quality AI image generation, especially when you account for its sub-second speed and professional-grade output quality.
Yes, FLUX.2 Klein is purpose-built for local deployment on consumer GPUs. The 4B model runs on GPUs with 13GB VRAM (RTX 3090, RTX 4070), while the 9B model requires ~29GB VRAM (RTX 4090 and above). Additionally, FP8 and NVFP4 quantized versions cut VRAM requirements by up to 55% while retaining full output quality, and the 4B model is Apache 2.0 licensed to allow commercial use.
Distilled variants (the default option on Img2Video) use 4-step inference optimized for speed, making them perfect for production and interactive use. Base variants are undistilled, preserving the full training signal for maximum flexibility. Choose Base if you need control over inference steps, plan to fine-tune with LoRA adapters, or want higher output diversity for research and custom pipelines.

Step-by-Step Guide to Using FLUX.2 Klein Text to Image

Create custom images in less than one second with the fastest available FLUX model

1
Write Your Prompt
2
Choose Model Variant
3
Generate Image

Type out a full, detailed description of the custom image you want to make. For best possible results, add details about subject, style, lighting, mood, and composition. FLUX.2 Klein supports both 4B and 9B variants.

Flexible AI Pricing

Pay-as-you-go credits or subscription plans. No hidden fees, cancel anytime.

Basic

Start your AI journey

399.99
1 Year
USD
9000points1 Month
Priority Support
Early Access
5 GB(Storage Space)
3(Maximum Projects)
Team Members
50 images1 Month
Audio Transcription
100 snippets1 Month
API Calls
Popular

Professional

Elevate your AI experience

799.99
1 Year
USD
27000points1 Month
Priority Support
Early Access
20 GB(Storage Space)
10(Maximum Projects)
Team Members
150 images1 Month
150 minutes1 Month
300 snippets1 Month
API Calls

Enterprise

Powerful support for your team

1999.99
1 Year
USD
75000points1 Month
Priority Support
Early Access
100 GB(Storage Space)
50(Maximum Projects)
10(Team Members)
600 images1 Month
600 minutes1 Month
1200 snippets1 Month
10000 calls1 Month